Code Snippets
This page will be updated from time to time with new code snippets, so stay tuned for further updates. In order to use the example shown below you will need to download the Raxan PDI Framework.
- Using Custom Validators
- Validating Form inputs
- Selecting the <a> tags on a web page
- Finding external Hyperlinks on a web page
- Zebra Stripes
- Loading an XML document
- How to create a new web Page
- How to load external html views
Using Custom Validators
How to create custom validators
<?php
require_once("raxan/pdi/gateway.php");
// add custom phone and money validators
RichDataSanitizer::addDataValidator('Phone', '/^[0-9]{3}-[0-9]{3}-[0-9]{4}$/'); // using regex
RichDataSanitizer::addDataValidator('ZipCode','validate_ZipCode'); // using callback
function validate_ZipCode($value){ // validate zip code
return preg_match('/^(\d{5}-\d{4})|(\d{5})$/',$value);
}
class MyPage extends RichWebPage {
protected $frm;
protected $updateFormOnPostback = true; // redisplay form values
protected function _load() {
// load the html page
$this->source('views/update-form.html');
// bind to form submit event
$this->frm = $this['form']->bind('submit', '.form_submit');
}
protected function form_submit($e) { // event callback
$msg = array();
$request = $this->clientRequest();
// validate user input
if (!$request->isPhone('phone')) $msg[] ='Please enter a valid phone number (format: 123-123-1234).';
if (!$request->isZipCode('zipcode')) $msg[] ='Please enter a valid US Zip code.';
if (count($msg)>0) {
$msg = '<strong>'.implode('<br />',$msg).'</strong>';
$this['body']->prepend($msg);
}
}
}
RichWebPage::Init('MyPage');
?>
Validating Form inputs
How to validate data submited via a web form
<?php
require_once("raxan/pdi/gateway.php");
class MyPage extends RichWebPage {
protected function _load() {
// load the html page
$this->source('views/signup-form.html');
// bind to the form submit event
$this->frm = $this['form']->bind('submit', '.form_submit');
}
protected function form_submit($e) { // event callback
$msg = array();
$data = $this->clientRequest();
$pwd = $data->value('password'); $cpwd = $data->value('cpassword');
// validate user input
if (!$data->value('name')) $msg[] ='Please enter your user name.';
if (!$data->isEmail('email')) $msg[] ='Please enter a valid email adress.';
if (!$pwd) $msg[] ='Please enter a valid password.';
else if ($pwd!=$cpwd) $msg[] ='Password typed mismatched.';
if (!$data->isUrl('website')) $msg[] ='Please enter a valid website.';
if (count($msg)>0) {
$msg = '<strong>'.implode('<br />',$msg).'</strong>';
$this['body']->prepend($msg);
}
}
RichWebPage::Init('MyPage');
?>
Selecting the <a> tags on a web page
Use this snippet to change to color of the links on a web page
<?php
require_once("raxan/pdi/gateway.php");
class MyPage extends RichWebPage {
protected function _load() {
// load the html page
$this->source('views/my-web-page.html');
// change the color of the links
$this['a']->css('color','green');
}
}
RichWebPage::Init('MyPage');
?>
Finding external Hyperlinks on a web page
Find all the extneral http:// links on page
<?php
require_once("raxan/pdi/gateway.php");
class MyPage extends RichWebPage {
protected function _load() {
// load the html page
$this->source('views/my-web-page.html');
// find external links
$this['a[href~="http://"]']
->css('color','purple') // change the color to purple
->css('border-bottom','1px dotted red'); // add a border
}
}
RichWebPage::Init('MyPage');
?>
Zebra Stripes
Add alternate colors to your html tables
<?php
require_once("raxan/pdi/gateway.php");
class MyPage extends RichWebPage {
protected function _load() {
// load the html page
$this->source('views/my-web-page.html');
// find even table rows
$this['table tr:even']
->css('background','#eee'); // add a background color
}
}
RichWebPage::Init('MyPage');
?>
Loading an XML document
How to load an XML document using the source() method
<?php
require_once("raxan/pdi/gateway.php");
class MyPage extends RichWebPage {
protected function _load() {
// load the XML document
$this->source('data/bills.xml', 'xml');
// find all cable bills
$bills = $this['bill[type="cable"]'];
echo $bills->length." Cable Bill(s) found.";
}
}
RichWebPage::Init('MyPage');
?>
Sample bills.xml file:
<bills>
<bill type="cable" date="1/10/2009" amount="20.00" paid="yes" />
<bill type="internet" date="2/1/2009" amount="30.00" paid="yes" />
<bill type="phone" date="2/1/2009" amount="40.00" paid="yes" />
<bill type="cable" date="3/10/2009" amount="20.00" paid="no" />
</bills>
How to create a new web Page
There are two ways you can create a webpage.
<?php
require_once("raxan/pdi/gateway.php");
$page = new RichWebPage();
$page->content("Hello world");
$page->reply(); // send page to client
?>
<?php
require_once("raxan/pdi/gateway.php");
class MyPage extends RichWebPage {
protected fuction _load() {
$this->content("Hello world");
}
}
$page = new MyPage();
$page->reply(); // sends page to client
?>
How to load external html views
<?php
require_once("raxan/pdi/gateway.php");
$view = 'views/contact-form.html';
$page = new RichWebPage($view);
//... code here
$page->reply(); // sends page to client
?>
You can also use the source() method
$page = new RichWebPage();
$page->source($view);
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